 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/

 package org.eclipse.ui.views.markers.internal;

 import org.eclipse.swt.graphics.Image;

 /**
  * Creation time field. Designed to display and compare creation times of IMarker objects.
  */
 public class FieldCreationTime extends AbstractField {

     private String description;

     private Image image;

     /**
      * The constructor
      */
     public FieldCreationTime() {
         description = MarkerMessages.description_creationTime;
     }

     /*
      * (non-Javadoc)
      * @see org.eclipse.ui.views.markers.internal.IField#getDescription()
      */
     public String getDescription() {
         return description;
     }

     /*
      * (non-Javadoc)
      * @see org.eclipse.ui.views.markers.internal.IField#getDescriptionImage()
      */
     public Image getDescriptionImage() {
         return image;
     }

     /*
      * (non-Javadoc)
      * @see org.eclipse.ui.views.markers.internal.IField#getColumnHeaderText()
      */
     public String getColumnHeaderText() {
         return description;
     }

     /*
      * (non-Javadoc)
      * @see org.eclipse.ui.views.markers.internal.IField#getColumnHeaderImage()
      */
     public Image getColumnHeaderImage() {
         return image;
     }

     /*
      * (non-Javadoc)
      * @see org.eclipse.ui.views.markers.internal.IField#getValue(java.lang.Object)
      */
     public String getValue(Object obj) {
         if (obj == null || !(obj instanceof ConcreteMarker)) {
             return ""; //$NON-NLS-1$
 }
         ConcreteMarker marker = (ConcreteMarker) obj;
         return String.valueOf(marker.getCreationTime());
     }

     /*
      * (non-Javadoc)
      * @see org.eclipse.ui.views.markers.internal.IField#getImage(java.lang.Object)
      */
     public Image getImage(Object obj) {
         return null;
     }

     /*
      * (non-Javadoc)
      * @see org.eclipse.ui.views.markers.internal.IField#compare(java.lang.Object, java.lang.Object)
      */
     public int compare(Object obj1, Object obj2) {
         if (obj1 == null || obj2 == null || !(obj1 instanceof ConcreteMarker)
                 || !(obj2 instanceof ConcreteMarker)) {
             return 0;
         }

         ConcreteMarker marker1 = (ConcreteMarker) obj1;
         ConcreteMarker marker2 = (ConcreteMarker) obj2;

         long value = marker1.getCreationTime() - marker2.getCreationTime();
         if (value < 0) {
             return -1;
         } else if (value > 0) {
             return 1;
         } else {
             return 0;
         }
     }
     
     /* (non-Javadoc)
      * @see org.eclipse.ui.views.markers.internal.IField#getDefaultDirection()
      */
     public int getDefaultDirection() {
         return TableComparator.ASCENDING;
     }
     
     /* (non-Javadoc)
      * @see org.eclipse.ui.views.markers.internal.IField#getPreferredWidth()
      */
     public int getPreferredWidth() {
         return 0;
     }
 }

